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boost/python/hello.cpp

+#include <boost/python.hpp>
+
+using namespace boost::python;
+
+const char* Greet()
+{
+    return "hello, world";
+}
+
+int Add(int i, int j) {
+    return i+j;
+}
+
+BOOST_PYTHON_MODULE(_hello) {
+    scope().attr("__doc__") = "boost.python example plugin";
+    def("greet", Greet);
+    def("add", &Add, "A function which adds two numbers");
+}

cmake-demo @ 1620a9db

+Subproject commit 1620a9db94aef83c036d7088d1002becddcb7fb0

python/contextmanager/test0.py

+#!/home/songxinkai/anaconda3/bin/python
+
+from contextlib import contextmanager
+
+class cls0:
+    def __init__(self):
+        self.f = -1
+    def __enter__(self):
+        print ("enter")
+        self.f = 2
+        return self
+    def __exit__(self, exc_type, exc_value, traceback):
+        print ("exit")
+        return True
+
+if __name__ == "__main__":
+    with cls0() as t:
+        print (t.f)

python/try_except/test0.py

+#!/home/songxinkai/anaconda3/bin/python
+import math
+
+while True:
+    try:
+        text = input('> ')
+        if text[0] == 'q':
+            break
+        x = float(text)
+        y = 1 / math.log10(x)
+        print ("1 / log10({0}) = {1}".format(x, y))
+    except ValueError:
+        print ("the value must be greater than 0")
+    except ZeroDivisionError:
+        print ("the value must not be 1")
+    except Exception:
+        print ("unexpected error")
+    else:
+        print ("success ", end="\n")
+    finally:
+        print ("next ", end=" ")